Well, that fire didn't work too good: you'll need to move them chickens to a safer place. Meanwhile, it wouldn't hurt to ask yer friends for some old protection magic.
In-Game Hint
Move chickens into a chicken coop to protect them, using the Store or Move tool. If you don't have rocks on your homestead, clear some land and wait for them to show up. Click "Ask" above to request arrowheads from friends.